Photographic-roll holder.



J. RICHARD & R. P. M. LAVIE= PHOTOGRAPHIC ROLL HOLDER.

APPLICATION FILED JAN- n. 1913.

1,155,508. Patented Oct. 5, 1915.

2 SHEETS-SHEET 1.

J. BIBHARD & R. P. M. LAVlE.

PHOTOGRAPHIC ROLL HOLDER.

APPLICATION FILED JAN. 11. 1913.

1,155,508. Patented Oct. 5, 1915.

2 SHEETSSHEET 2.

nlllllllll Ill.

taking the photographs.

JD'LES RICHARD AND RENE PIERRE MARIE LAVIE, PARIS, FRANCE.

Specification of Letters Patent.

PHOTOGBAPHIC-ROLL HOLDER.

Patented Oct. 5, 1915.

Application filed January 11, 1918. Serial No. 741,515.

To all whom it may concern:

Be it known that we, JULns RICHARD, of 25 Rue Mlingue, in the city of Paris, Republic of France, manufacturer of optical instruments, and RENE PIERRE MARIE LAvm,

of 16 Rue du Faubourg Saint-Denis, in the city of Paris, Republic of France, doctor of medicine, have invented Improvements in Photographic-Roll Holders, of which the following is a full, clear, and exact description.

It is known that photographic films are highly sensitive to variation in temperature and in hygrometric conditions, thus for example, they become hollow under the influence "o-f the dryness of the air and arched under the influence of moisture. It follows that these films present the inconveniences of not lying perfectly fiat in the focal plane of the photographic apparatus. Even in the case of a Well stretched film it forms more or lessaccentuated undulations. In these conditions, every point of the portion of the film that. is to be exposed is not exactly located in the focal plane. This defect is not of great importance in ordinary photographic apparatus provided with long focus lenses and which furnish photographs intendedto be viewed directly, or even in cinematographs in which the film is replaced with sufficient rapidity not to afford it the time to be influenced by external physical agents such as heat and humidity. This is not the case, however, with verascopes, the

objectives of which are of short focal length, since a slight undulation of the film is sufficient to produce cloudy patches in the image.

This defect is increasingly serious if the pictures are intended to be examined with magnifying glasses. With verascopes, therefore, it is important that the film should be held fiat and exactly in the focal plane while The present invention permits of obtaining this result in an exceedingly simple manner. It is broadly characterized by the fact that at the proper moment the film is pressed against a fixed "glass with parallel faces, arranged on the same side as the objectives, by'm'eans of a movable plate which can be brought toward I and separated from the glass, this movement being controlled by special mechanism.

- The novel device is completed by a safety device which prevents the film from being advanced when it is pressed against the g ass.

The invention is illustrated by way of ex ample only in the accompanying drawings in which:

Figure 1 is a plan view of the improved roll holder; Fig. 2 is a similar view,"the parts occupying a different position; Fig. 3 is a view made by looking in'the direction of the arrows, Fig. 1; Fig. 4 is a section made 'online AA of Fig. 3; Fig. 5 is a section made on line BB of Fig. 4; Fig. 6 is a section made on line C-C of Fig. 1; Figs. 7 and 8 are left hand and right hand views of the apparatus; Fig. 9 is a view similar to Fig. '8. Flg. 10 is a section on line I)-D of Fig.

8 with certain parts shown in a different po sition. Fig. 11 is a section similar to Fig. 4, showing the operation; Fig. 12 is a back view of the roll holder, the cover being removed.

As illustrated in the drawing, a roll holder constituted by a box a, parallelepiped in form, is mounted on the verascope b (Fig; 1) in place. of the ordinary slide containing the plates, with this object the said box is provided with ribs 0 (Fig. 7 intended to engage in grooves in the verascope. The roll holder is closed by a cover 0 which is readily detachable and held in place by pins a on the body of the roll holder (Fig. 8) which engage in' corresponding holes in the cover and by pins 0 on the cover, upon which leaf springs d engage (Figs. 4 and 7).

In order to remove the cover, it is only necessary to separate the springs d whereupon the cover can be removed by displacing it slightly to the right. In this roll holder a supply spool e from which the film is unwound and'a spool f onto which the film is wound are arranged. Each of these spools is carried in the ordinary manner, by a nipple g, and a plate 72. (Fig. 6). This plate It is integral with a rod h and a milled knob j, which permits of rotating it. A spring 7' roll holder, and bearing upon the bottom of this box on the one hand and on the other hand against a disk Z integral with the. tappet presses this plate is toward the interior of the roll holder.

The, film y unwinding from the spool e passes over rollers m, 'm. and m (Fig. 4). The film is located between the rollers 1 and m and'also between a glass 0 with parallel faces and a plate p. A guide m (Fig. 4) serves to facilitate the introduction of the band. The glass rests upon slide ways 0 (Figs. 5 and 10). To facilitate fitti and removing it, the roll holder is provide with a small shutter g (Fi 9 Fig. 8 shows this shutter closed and Figs. 9.and 10 illustrate the same open. It is held closed by small bolts 9 which can be operated by means of pins 9' (Fig. 8).

The aforesaid late p can be brought toward or separated from the lass o by means of a cam cdntrol device. '1 e plate carries two angle pieces 1' (Fig. 5) forming slides in fixed sl ldeways integral with the box of-the roll holder. Each of these angle pieces is cut as shown in Fig. 4 in such a manner as to form a housing r for a cam s. The two cams s are keyed upon a shaft t provided with a handle t for the purpose of rotating it. In the position illustrated in Figs. 1 and 4 the plate p is separated from the glass 0. In this position, the film y is able to slide between t e plate and the glass so that the exposed portlon of the film can be wound up and an unexposed length substituted therefor.

In order to bring the plate I) and the glass 0 together, the handle t is rotated through a quarter turn in a clockwise direction, the cams s displace the plate 1) which applies the film to the glass (position illustrated in Figs. 2 and 11) while preventing this film from formin undulations. The film being thus perfect? plane the photograph is absolutely clear. n order to prevent attempts to displace the film while it is clamped between the plate and the glass, the apparatus comprises special safety means.

The disk Z of the support for the winding spool is serrated upon its periphery and forms a ratchet. A spring pawl u (Figs. 1

and 6) is in mesh with this ratchet and onlypermits the rotation of the operating handle in the direction for winding the film upon this spool. This pawl can be blocked by a bolt '0 (Fig. 1) controlled by a cam keyed upon the shaft t.

In the drawing has been illustrated a cam 12 (Fig. 2) engaged in a housin having a profile suited to that of the b0 t. In the position illustrated in Fig. 1, in which the plate p is separated from the glass, the bolt is removed from the awl, so that the handle 7' may be rotated. the contrary, in the 8 to 10) pivoted at shifting of the table against said glass late,

and means actuated by the o ration 0 said handle for locking the win ing spool when the film is clamped between said table and glass late.

2. n a photographic apparatus, the comblnation of a fixed glass, a movable table, a supply spool, a winding spool adapted to ta e u a film passing between said glass and ta le from said supply spool, an operating handle for controlling the shifting of the ta le against said lass, and a bolt actuated by the o ration 0 said handle for lockin the win ing spool when the film is clampe between said table and glass.

3. In a photographic apparatus, the combination o a fixed glass, a movable table, a supply spool, a winding spool adapted to ta e up a film passing between said glass and table from said sup ly spool, an operating handle for control ing the shifting of the table against said glass, a bolt actuated by the operation of said handle, a ratchet for said winding spool and a pawl engagin with said ratchet and adapted to be lock by said bolt when the film is clamped between said table and lass.

4. In a photographic apparatus, the combination of a fixed glass, a movable table, a supply spool, a winding spool adapted to take up a film passing between said glass and table from said sup 1y spool, an operating handle for control ing the shifting of the table against said glass, a bolt actuated by the operation of said handle, a ratchet for said winding spool, a pawl engaging with said ratchet and adapted to be locked by said bolt when the film is clamped between said table and glass, and means to indicate whether the film is in a free or clamped position.

5. In a photographic apparatus, the combination of a fixed glass, a movable table, a supply spool, a winding spool adapted to ta e u a film passing between said glass and ta 1e from said supply spool, a cam shaft rovided with an operating handle and a apted by its engagement with the table to shift said table against the glass so as to clamp the film therebetween, a ratchet for the winding spool, a pawl in engagement with said ratchet, a bolt member controlled by said cam shaft and adapted to lock said provements in verascopes, signed by us this pawl so as to prevent further rotation of 23rd day of December 1912.

said IZltChet wheg lighe filgilislthusdclaampexii, JULESRIQHARD an in ex actuate y sai 0 tan a a te 5 to indicate whether the film is in a fre e or RENE PIERRE MARIE LAVIE' clamped position, substantial1y'as herein de- Witnesses: scribed. HANSON C. Coxn,

The foregoing specification of ourim- RENE Tumor. 

